diff options
Diffstat (limited to 'drivers/char/mem.c')
| -rw-r--r-- | drivers/char/mem.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 934ffafedaea..672b08e694d0 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -26,6 +26,7 @@ #include <linux/bootmem.h> #include <linux/splice.h> #include <linux/pfn.h> +#include <linux/smp_lock.h> #include <asm/uaccess.h> #include <asm/io.h> @@ -79,7 +80,7 @@ static inline int valid_mmap_phys_addr_range(unsigned long pfn, size_t size) } #endif -#ifdef CONFIG_NONPROMISC_DEVMEM +#ifdef CONFIG_STRICT_DEVMEM static inline int range_is_allowed(unsigned long pfn, unsigned long size) { u64 from = ((u64)pfn) << PAGE_SHIFT; @@ -326,7 +327,10 @@ static void mmap_mem_close(struct vm_area_struct *vma) static struct vm_operations_struct mmap_mem_ops = { .open = mmap_mem_open, - .close = mmap_mem_close + .close = mmap_mem_close, +#ifdef CONFIG_HAVE_IOREMAP_PROT + .access = generic_access_phys +#endif }; static int mmap_mem(struct file * file, struct vm_area_struct * vma) @@ -889,6 +893,9 @@ static const struct file_operations kmsg_fops = { static int memory_open(struct inode * inode, struct file * filp) { + int ret = 0; + + lock_kernel(); switch (iminor(inode)) { case 1: filp->f_op = &mem_fops; @@ -932,11 +939,13 @@ static int memory_open(struct inode * inode, struct file * filp) break; #endif default: + unlock_kernel(); return -ENXIO; } if (filp->f_op && filp->f_op->open) - return filp->f_op->open(inode,filp); - return 0; + ret = filp->f_op->open(inode,filp); + unlock_kernel(); + return ret; } static const struct file_operations memory_fops = { @@ -983,9 +992,9 @@ static int __init chr_dev_init(void) mem_class = class_create(THIS_MODULE, "mem"); for (i = 0; i < ARRAY_SIZE(devlist); i++) - device_create(mem_class, NULL, - MKDEV(MEM_MAJOR, devlist[i].minor), - devlist[i].name); + device_create_drvdata(mem_class, NULL, + MKDEV(MEM_MAJOR, devlist[i].minor), + NULL, devlist[i].name); return 0; } |